Lab #3 - Sieve Analysis (write up) PDF

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Title: Sieve Analysis of a soil sample. Aim: To determine the distribution of aggregate through a vibratory sieve shaker. Apparatus and Materials: Aggregate, counter balance scale, vibratory sieve shaker Diagram:

Figures 1&2 : Showing the set up of apparatus and materials Procedure: 1. The apparatus and materials were set up as shown in the diagram and the aggregate obtained. 2. The aggregate was poured into the vibratory sieve shaker, closed, tightly secured and was put on and left to shake for 10mins. 3. After 10mins, the contents in each layer, including the pan, was weighed and the mass recorded. 4. The data was tabulated and a graph was plotted to show the particle size distribution.

Results: Total mass, mo = 2732g Sieve, mm

Mass Retained, g

Mass Retained Percentage ,% 0 58.27 24.49 6.00 6.64 0.99 1.35 0.26

20.00 0 10.00 1592 6.30 669 5.00 164 2.36 236 1.60 27 300µm 37 pan 7 /fines Sum 2732 Table showing data obtained

Mass Cumulative Cumulative Passed Weight, g Percentage, Through, % g 2732 0 0 1140 1592 58.27 471 2261 82.76 307 2425 88.76 71 2661 97.40 44 2688 98.39 7 2725 99.75 0 2732 100.00

% Pass

100.00 41.73 17.24 11.24 2.60 1.61 0.26 0.00

GRAPH SHOWING PERCENTAGE PASS VS SIEVE SIZE

Percentage Pass, %

25 20 15 10 5 0 0

20

40

60 Sieve Size, mm

Calculations: % pass =

mass passed through total mass

1140 2732

For 10mm:

For 5mm:

307 2732

100 1

100 = 41.73% 1

×

471 2732

For 6.30mm:

×

×

100 1

= 17.24%

100 = 11.24% 1

×

For 2.36mm:

71 2732

×

100 1

= 2.60%

For 1.60mm:

44 2732

×

100 1

= 1.61%

For 300µm: For pan/fines:

7 2732

×

0 × 2732

100 1

= 0.26%

100 = 0.00% 1

80

100

120

Discussion: This sieve analysis experiment was conducted to determine the distribution of aggregate through a vibratory sieve shaker. A sieve analysis (or gradation test) is a practice or procedure used (commonly used in civil engineering) to assess the particle size distribution (also called gradation) of a granular material. The size distribution is often of critical importance to the way the material performs in use....